#include <iostream>
using namespace std;
class Animal
{
public:
    virtual void runing() = 0;
};

class People : public Animal
{
public:
    int height;
    virtual void Sing() = 0;
    People(int height) : height{height} {}
};
class Student : public People
{
public:
    Student(int height) : People(height)
    {
    }
    void runing() override
    {
        cout << "Student is runing" << endl;
    }
    void Sing() override
    {
        cout << "Student is sing song" << endl;
    }
};
int main()
{
    Student s1(18);
    cout << s1.height << endl;
    s1.runing();
    s1.Sing();
    return 0;
}
